Showing papers in "Marine Chemistry in 2008"

TL;DR: In this paper, the authors used parallel factor analysis (PARAFAC) of fluorescence spectra collected on trans-oceanic cruises in the Pacific and Atlantic oceans to investigate the optical characteristics of dissolved organic matter in waters with limited freshwater influence (salinity > 30).

TL;DR: In this article, electrospray ionization coupled with Fourier transform ion cyclotron resonance mass spectrometry (ESI-FTICR-MS) is utilized to molecularly characterize DOM as it is transported along a river to estuary to ocean transect of the lower Chesapeake Bay system.

TL;DR: In this article, the authors determined the total organic carbon (TOC), total nitrogen (TN) and their δ 13 C and δ 15 N values from 110 sediment samples from the Ayeyarwady (Irrawaddy) continental shelf, northern Andaman Sea to decipher the concentration and source of organic matter.

TL;DR: In this article, solid-state voltammetric (micro) analyzers have been used in a variety of environments to study biogeochemical processes, such as sediment, microbial mats, cultures and the water column including hydrothermal vents.

TL;DR: In this paper, the uncertainties associated with 223Ra and 224Ra measurements using a Radium Delayed Coincidence Counter are determined on a detailed error propagation basis with a confidence interval of 1σ.

TL;DR: In this paper, a reversed-phase liquid chromatography (RP) method was used for separating organic matter (DOM) using fluorescence/absorption detection and Fourier transform ion cyclotron mass spectrometry (FT-ICR-MS).

TL;DR: The results of a general enrichment of gel particles support the concept of a hydrated gelatinous interfacial layer with a complex matrix of dissolved organic matter rather than a more classical model of organized layers of "wet" and "dry" surfactants.

TL;DR: In this paper, multiple tracers of groundwater input (salinity, Si, 223Ra, 224Ra, and 226Ra) were used together to determine the magnitude, character (meteoric versus seawater), and nutrient contribution associated with submarine groundwater discharge across the leeward shores of the Hawai'ian Islands Maui, Moloka'i, and Hawai'i.

TL;DR: In this article, a series of sediment cores and corresponding groundwater profiles were collected for analysis of the four radium isotopes, as well as dissolved and sediment associated manganese, iron, and barium.

TL;DR: In this paper, the authors collected samples of sea ice, snow, brine and underlying seawater at the ISPOL drifting station (Ice Station POLarstern, 68°S/55°W) in spring-summer period (November 2004-January 2005).

TL;DR: In this paper, the authors investigated the production and distribution of monomethylmercury (MMHg) in sediments of New York/New Jersey (NY/NJ) Harbor across wide and contrasting ranges of inorganic Hg (Hg(II)), sulfide, and organic matter.

TL;DR: In this paper, an autonomous indicator-based pH sensor for seawater applications adapted from a design originally developed for freshwater pH measurements (SAMI-pH) is described, which uses a different pH indicator, flow cell design, detection system, and mixing configuration to improve upon the freshwater performance.

TL;DR: In this article, a rectangular frame was constructed of titanium, holding two rows of 12 ultraclean samplers, as well as various sensors, deployed to deep ocean waters by an 8000 m length Kevlar wire with internal power and signal cables.

TL;DR: In the Beringia 2005 expedition, the dissolved gaseous mercury (DGM) was measured continuously in the surface water and the DGM concentration was measured using an equilibrium system, i.e. the DMG in the water phase equilibrated with a stream of gas and the gas was thereafter analyzed with respect to its mercury content as discussed by the authors.

TL;DR: In this article, a three-year monthly sampling of the subterranean estuary (STE) in Waquoit Bay, MA, found highly variable radon activities (50 −1600 L−1) across the fresh-saline interface of the aquifer.

TL;DR: In this article, a 1-year seasonally focused field investigation on the behavior and fate of Hg and MMHg in New York/New Jersey Harbor Estuary (NY/NJ Harbor) was conducted.

TL;DR: In this article, an in situ methane production/consumption cycle during a summer phytoplankton bloom and a potential link to DMSP concentration in Storfjorden (Svalbard Archipelago) is reported.

TL;DR: In this article, the importance of advective transport of water through permeable estuarine and salt marsh sediments is demonstrated, and the strong interactions that occur between surface and subsurface waters as these rivers encounter coastal marshes lead to consider these river mouths as marsh-dominated in terms of their chemical fluxes to the ocean.

TL;DR: It is shown that DOM assembly can be readily induced by nanomolar concentrations (20 µg × L − 1 ) of hydrophobic exopolymer released by Sagittula stellata (SEP), and results indicate that SEP-induced DOM network formation exhibit characteristic features ofhydrophobic interactions.

TL;DR: In this article, microsensors were used to measure porewater profiles of NOx, NO2-, O-2 and N2O in a mangrove sediment.

TL;DR: In this article, the authors evaluated the preserved flux of CaCO 3 in cores from the central equatorial Pacific Ocean (∼140°W) using the 230 Th-normalization technique.

TL;DR: In this article, the first comprehensive winter dataset (0-1000m depth) for dissolved zinc, cadmium, copper, nickel, cobalt and lead along with macronutrinets phosphate and silicon, between 40°S-52°S, traverses the Subantarctic zone (SAZ), east of Australia.

TL;DR: The results show that at natural seawater arsenic concentrations, both algae take up substantial amounts of inorganic arsenic that is complexed with structural elements or sequestered in vacuoles as stable complexes.

TL;DR: In this paper, the authors measured natural abundance profiles of N 2, nitrate, ammonium, suspended particulate organic nitrogen (PON) and total organic nitrogen concentrations and nitrogen stable isotopes in the Black Sea during five research cruises.

TL;DR: Differential transport and degradation of bulk organic carbon and specific terrestrial biomarkers in the surface waters of a sub-arctic brackish bay mixing zone was studied in this paper.

TL;DR: In this article, the air-water exchange of polychlorinated biphenyl (PCB) and organochlorine pesticides (OCPs) was investigated using paired airwater samples (n ǫ = 16) collected in July and February-March, 2005 from Guzelyali Port in Izmir Bay, Turkey.

TL;DR: In this article, the 13 C isotopic composition of IP 25 in sea ice, in sediment trap material collected under sea ice and in high latitude northern sediments, is distinctive (isotopically "heavy" and distinguishable from that of organic matter of planktonic or terrigenous origin.

TL;DR: In this paper, the hypothesis of nutrient-rich porewaters seeping at low tide through sediments to channel waters, which drain tidal flats during ebb, was evaluated in the Arcachon lagoon.

TL;DR: In this paper, the authors used radium isotopes (223 Ra, 224 Ra, 226 Ra, and 228 Ra) and water chemistry to identify two chemically distinct sources of submarine groundwater discharge (SGD) in Celestun Lagoon, Yucatan, Mexico.